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J. Phys. Soc. Jpn. 58 (1989) pp. 2215-2218  |Next Article|  |Table of Contents|
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Letters

The Irreversibility Inherent in Quantum Mechanics

Yutaka Toyozawa

Department of Physics, Chuo University

(Received April 11, 1989)

Arguments are presented for the viewpoint that irreversibility is inherent in quanturn mechanics, irrespective of the number of particles participating. This fact is related to the notion of transition–ramifying evolution–which is characteristic of quantum mechanics. It is in contrast to classical mechanics based on the notion of orbit, where the irreversibility arises only as the result of a large number of particles or a certain complexity of the system. The statistical assumption needed for the derivation of irreversibility in classical mechanics is absorbed into the uncertainty principle of quantum mechanics, and is revived as inherent irreversibility. The statements conform with the parallelism of quantum mechanics and classical statistical mechanics emphasized in a previous report. ©1989 The Physical Society of Japan

URL: http://jpsj.ipap.jp/link?JPSJ/58/2215/
DOI: 10.1143/JPSJ.58.2215


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